Model # 421 Official Western Tool snow blower

Here are the diagrams and repair parts for Official Western Tool 421 snow blower, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS

Showing 10 of 137 parts |

#41

Auger housing assembly diagram

Lock nut

Part #90008287

Replaced by #703232

This item is not returnable

$6.24 |

14% OFF Phone Price : $7.24

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Qty

#19

Upper handle assembly diagram

Spring

Part #90001673

Replaced by #1673MA

$12.31 |

14% OFF Phone Price : $14.31

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Qty

#13

Auger housing assembly diagram

Knob

Part #90071041

Replaced by #1501260MA

$10.93 |

15% OFF Phone Price : $12.93

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Qty

#34

Auger housing assembly diagram

Snowblower shear bolt

Part #90070971

Replaced by #1501216MA

This item is not returnable

$6.42 |

13% OFF Phone Price : $7.42

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#36

Auger housing assembly diagram

Spacer

Part #90003943

Replaced by #1501216MA

This item is not returnable

$6.42 |

13% OFF Phone Price : $7.42

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Qty

#17

Upper handle assembly diagram

Lock nut

Part #90071035

Replaced by #703251

$8.07 |

11% OFF Phone Price : $9.07

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Qty

#12

Gear box diagram

Quad ring

Part #90053737

Replaced by #53737MA

This item is not returnable

$8.49 |

11% OFF Phone Price : $9.49

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Gear box diagram

Gasket

Part #90000897

Replaced by #897MA

This item is not returnable

$22.85 |

21% OFF Phone Price : $28.85

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#13

Upper handle assembly diagram

Cable

Part #90001580

Replaced by #1580MA

This item is not returnable

$24.13 |

20% OFF Phone Price : $30.13

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Qty

#28

Motor mount assembly diagram

Bolt

Part #90071015

Replaced by #1X20MA

$7.57

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Symptoms for gas snowblowers

Choose a symptom to see related snowblower repairs.

View all

How do I tune up my snowblower?

Things to do: replace the spark plug, change the oil, rebuild the carburetor, adjust valve lash, adjust or replace the b…

Why won't my snowblower throw snow far enough?

Main causes: clogged chute, damaged auger blades, broken shear pins, worn auger belt, damaged gear case, engine problems…

Why does my snowblower stop running after a few seconds?

Main causes: dirty carburetor, stale fuel…

What should I do about a damaged snowblower tire?

Main causes: punctured tire, damaged rim…

Why does my snowblower engine run rough?

Main causes: dirty carburetor, clogged fuel filter, dirty spark plug, incorrect valve lash, leaky engine gaskets…

Why won't my snowblower start?

Main causes: stale gas, clogged carburetor, clogged or broken fuel line, dirty spark plug, bad rewind starter, incorrect…

Why doesn't my snowblower self propel?

Main causes: loose drive clutch cable, damaged drive clutch cable, worn friction disc, scraper blade scraping the ground…

Why won't my snowblower chute turn?

Main causes: snow build-up in chute, chute drive mechanism failure, bad chute control assembly…

Why won't my snowblower clear snow well?

Main causes: clogged chute, snow build-up in auger housing, broken auger shear pins, auger drive belt needs adjustment, …

Repair guides for gas snowblowers

These step-by-step repair guides will help you safely fix what’s broken on your snowblower.

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How to adjust snowblower engine valve lash

Adjust the engine valve lash on your snowblower to keep the engine starting and running smoothly.…

Repair difficulty

Time required

15 minutes or less

How to adjust snowblower skid shoes

To prevent snowblower auger and shave plate damage, adjust the skid shoes regularly to keep the shave plate ¼-inch high.…

Repair difficulty

Time required

15 minutes or less

How to replace a snowblower shave plate

Follow the 7 easy steps in this repair guide/video to replace a worn out shave plate on your snowblower.…

Repair difficulty

Time required

15 minutes or less

Effective articles & videos to help repair your snowblowers

Use the advice and tips in these articles and videos to get the most out of your snowblower.

View all

How to make your snowblower last longer

Learn the steps to take to adjust and maintain your snowblower so it lasts longer.…

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

Top questions about Sears and Sears PartsDirect

Model # 421 Official Western Tool snow blower

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Symptoms for gas snowblowers

How do I tune up my snowblower?

Why won't my snowblower throw snow far enough?

Why does my snowblower stop running after a few seconds?

What should I do about a damaged snowblower tire?

Why does my snowblower engine run rough?

Why won't my snowblower start?

Why doesn't my snowblower self propel?

Why won't my snowblower chute turn?

Why won't my snowblower clear snow well?

Repair guides for gas snowblowers

How to adjust snowblower engine valve lash

How to adjust snowblower skid shoes

How to replace a snowblower shave plate

Effective articles & videos to help repair your snowblowers

How to make your snowblower last longer

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Top questions about Sears and Sears PartsDirect

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